Rotten root and burned root are the two major physiological diseases of watermelon seedlings, and have a great impact on the cultivation of watermelon seedlings. Therefore, the author suggests that the melon farmers take corresponding preventive measures based on the causes of the disease.
Rotten root
Symptoms: The roots changed from milky white to red-brown, no new roots, no growth, slow growth, and wilting of seedlings. It is mainly caused by the low temperature and high humidity of bed soil. Rotten roots are more likely to occur in the rainy days. In addition, continuous cropping plots can easily lead to rotted watermelon roots. Preventive measures: To improve the environmental conditions for raising seedlings, it is best to use electric hotbeds or bio-heated hotbeds for raising seedlings in early spring; control watering, especially on rainy days; do not water on light rainy days; Applying methods such as plant ash to increase temperature and reduce humidity, in order to facilitate the growth of melon seedlings as soon as possible; after the melon seedlings issue new roots, 4,000 times of 802 and 100 times urea mixture is poured to promote the growth and development of watermelon roots.
Burning root
Symptoms: Yellowing of the root system, no new roots but no rot, slow growth on the ground, short and brittle plants, and formation of young seedlings. It is mainly caused by excessive fertilization and dry soil. In addition, uneven mixing of bed soil is also prone to burning roots. Preventive measures: When using bed soil, it is necessary to use fertilizer, especially to avoid excessive use of fertilizer; organic fertilizer must be thoroughly cooked before application, and be fully mixed with chemical fertilizer and bed soil; seedbed should be timely watered to keep bed soil moist To prevent melon seedlings from burning due to lack of water in the soil; to increase the amount of watering of the melon shoots with burned roots, it is advisable to wet the bed soil, do not over water in case of long-term over-wetting of bed soil, and increase Measures such as temperature and heat preservation, appropriately raising the temperature of the bed in order to facilitate the growth of the roots of the watermelon; using replenishment water to apply 4000 times of the 802 solution to promote the recovery of the watermelon roots.
Super Absorbent Bath Mat,Bath Mat,Diatomite Health Hot Bath Mat,Non Slip Bath Mat
Dongguan Vanilla Bioengineering Co., Ltd. , https://www.healthecigarette.de